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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 115

Octane, C8H18C_8H_{18}C8​H18​, is a primary component of petrol.

The equation for the complete combustion of octane is shown below:

2C8H18+zO2→16CO2+18H2O 2C_8H_{18} + zO_2 \rightarrow 16CO_2 + 18H_2O 2C8​H18​+zO2​→16CO2​+18H2​O

What is the value of z z\,z needed to balance the equation for this reaction?

A

171717

B

252525

C

343434

D

505050

Markscheme

1.1 Formulae, equations and hazards Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 Formulae, equations and hazards

230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.

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